622121455 has 4 divisors (see below), whose sum is σ = 746545752. Its totient is φ = 497697160.

The previous prime is 622121363. The next prime is 622121491. The reversal of 622121455 is 554121226.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-622121455 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62212141 + ... + 62212150.

It is an arithmetic number, because the mean of its divisors is an integer number (186636438).

Almost surely, 2^622121455 is an apocalyptic number.

622121455 is a deficient number, since it is larger than the sum of its proper divisors (124424297).

622121455 is a wasteful number, since it uses less digits than its factorization.

622121455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124424296.

The product of its digits is 4800, while the sum is 28.

The square root of 622121455 is about 24942.3626587378. The cubic root of 622121455 is about 853.6733549779.

The spelling of 622121455 in words is "six hundred twenty-two million, one hundred twenty-one thousand, four hundred fifty-five".